Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-19-2018, 08:11 PM   #1
Veteran Member
 
City: Long Beach, CA
Country: USA
Vessel Name: Peterpan 111
Vessel Model: Gulfstar
Join Date: Apr 2013
Posts: 53
Air in line ??

I have a 1975 35 ft Gulfstar with 2 Perkins 4-154 engines which for the last 10 years start and ran fine. I run them at least weekly with no problems. About 6 moths ago the port engine would turn over fine but would not start. I bled the system and it fired up and ran good. Kept running both engines at least weekly for about two months.THEN port engine would turn over but not start. This time I just primed the pump and opened up No.1 injector nut till fuel came out and engine started and ran. Tightened everything up again and continued to run engine at least weekly. THEN about two months and again port engine wouldn't fire up. Primed pump and slackened of No.1 injector nut until fuel came through and engine started again. Ran it weekly, all fine, then the other day, port engine would not fire up again. Seems like air getting in somewhere, but where ???
Any info or suggestions would be appreciated as to where to start, or what to look for. I have checked all connections for fuel line, injector pump and fuel pump. Thank you.
__________________
Advertisement

Joew2604 is offline   Reply With Quote
Old 07-19-2018, 08:17 PM   #2
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,245
Check hose and lift pump diagphram condition.
__________________

__________________
If you can live with the consequences, go for it - wg
Y'am what y'am an' thats' all that y'am - Popeye
I had an allergic reality - Jillie the Bean
boatpoker is offline   Reply With Quote
Old 07-19-2018, 09:58 PM   #3
Senior Member
 
Conall63's Avatar
 
City: Ft Myers, Florida
Country: USA
Vessel Name: Homegrown
Vessel Model: Roberts TY 43
Join Date: Apr 2014
Posts: 209
Bad lift pump? Not an expensive item. So inexpensive, everyone who has one should carry a spare.


Conall
Conall63 is offline   Reply With Quote
Old 07-20-2018, 03:49 AM   #4
Guru
 
Irish Rambler's Avatar
 
City: NARBONNE
Country: FRANCE
Vessel Name: 'Snow Mouse.'
Vessel Model: BROOM FLYBRIDGE 42.
Join Date: Apr 2014
Posts: 1,169
As others have advised check the connections, lift pump etc but you should have a non return valve in your fuel line, it may be blocked, or some tiny particle lodged between two faces in the valve stopping it from making a good seal.
Take it off, clean it thoroughly with WD40 and try and blow through it, it should be air/fuel tight. When refitting be sure to put it back in the correct way to allow fuel to flow to the engine.
I once changed a fuel line fitting and enthusiastically overtightened the nut and distorted the olive and the end of the copper pipe.
Endless hassle as I checked every connection until I realized my own stupidity and after fixing it gave myself a mental kick up the !.
Check any fuel line connections you've recently worked on.
Irish Rambler is offline   Reply With Quote
Old 07-20-2018, 06:16 AM   #5
Veteran Member
 
crashley's Avatar
 
City: hazelwood north
Country: australia
Vessel Name: GULL
Vessel Model: WW2 Work boat
Join Date: May 2014
Posts: 35
air leak at the filter orings or injector pump
crashley is offline   Reply With Quote
Old 07-20-2018, 07:04 AM   #6
Senior Member
 
Conall63's Avatar
 
City: Ft Myers, Florida
Country: USA
Vessel Name: Homegrown
Vessel Model: Roberts TY 43
Join Date: Apr 2014
Posts: 209
FYI. Most fuel line fittings with metal to metal seals and seats should go together dry. Use a generous dose of brake clean prior to assembly and then a blast of air if you have a compressor on board.



Conall
__________________

Conall63 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 08:21 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012